Handle attachment for drills



April 24, 1928.

' S. SEAVER HANDLE ATTACHMENT FOR DRILLS Filed May 16, 1925 2Sheets-Sheet 1 INVENTOR h HHHHHHH "DUI 10 Ill 4 I SAMUEL SEA um BY/ATTORNEY "am .6 MW

Hlluum Patented 24;

f UNITED STATES PATENT 1 oF 1c f t SAMUEL 'SEAVER, joE EAI LEYBU Y.ONTARIO, CANADA, Assienon To onrchao rnEUmArIcrooEcoMrAnv, or NEW roan,n.

JERSEY. g Y

Y., a CORPORATION or NEW HANDLE ATTACHMENT on jnnILLs.

Application filed May 16, 1925. Serial'No. 30,661.

.Thisinvention' relatesto drills of the-per- 'cussive type used inmining, quarrying and similardevelopment work and-more parv ti cularlyto a handle attachment arranged toadapt a cradle mounted drill for useas a manually supported tool. The invention is in the nature of animprovementflupon the demountable handle device disclosed and claimed inthe copending application of Forrest H. Blanding SerialNo. 725,315

filed July 10, 19,24. 1

Among the objects of .theinvention are to avoid relative angularmovement of handle and drill by providing a more rigid connectionbetween the same, to so arrange the connection that it will notinterfere with the quick mounting and demounting of the attachmentnorwith the action of resilient supports for the handle proper, and ingeneral toimprove prior structurein the interests of more ellicientnndsatisfactory service, .In order to illustrate the invention one concreteembodiment thereof is shown in the accompanying drawings, in which: IFig. 1 is'a side elevational view ofa percussive drill ofthe cradle orshell mounted type having the present invention applied thereto; 6 Y, j

Fig. 2 is a right end elevational view of the. part shown in Fig. 1; v

r Fig. 3 is a fragmentary sectional view on the line 33 'of Fig. 2;

F ig. 4 is a bottom plan view of the parts shown in Fig. 1; and V p Fig.5 is a fragmentary sectional View through the drill on the line 55 ofFigs.

1 and 4 showing the yokeot the handle at tachment in side elevation. I

The invention is shown as applied to a percussive drill A of thepressure fluid type having parts secured to or integral with the drillcylinder forcooperation with a shell mounting (not shown), such as theprojcctions or wings a and the feed nut a. The detachable handle deviceadapting the drill to be manually supported and operated consists of amember or'block 6 constructed and arranged to cooperate with the cradleor shell engaging portions of .the drill, namely grooves or recesses 7receiving the latter. Block 6 has an end plate 8 tormingan abutment forthe feed nut a and a perforation 8 in line with the bore of the feed nutfor ment in the above described the wings a, by the provision of theaxial.

the insertion of a clamping bolt any which the block 6 is rigidlysecured to the nut-and consequently to the drill as indicated? Alignedpairs of perforated ears 10 on block 6 slidinglyreceive rods 11 whichare parallel} with each other and with the axis of the" drill. Rods 11havebent'ends 11 carrying a handle 12 arranged to dispose the latter inline with the axis of the drill and transverse thereto. Coiled springs13 encircle the rods on opposite sides of'block 6 and yieldingly resistmovement of the handle 12 relativeto block 6 in both directions. The

inner ends of springs 18 engage as abutments the outer faces of cars 10,and the outer ends otthe springs engage suitable opposed abutments onthe rods, as collars 14 adjacent the handle ends thereof and nuts 14 atthe rod ends remote from the handle.

The handle device as heretofore described is substantially identicalwith that disclosed in the copending Blanding application No. 725,315mentioned above. 'Inpractice it was found that rods of the'abovedescribed device had a tendency to angular movement relative to block 6with the latter asa pivot thus subjecting parts of the attachment tounduestrain and hampering to a certain extent the directing of the tool.The improve handle attachment and constituting the present invention wasdeveloped to overcome the above tendency. The invention consists insuitable structure for maintaining the rods 11 in substantially rigidparallelism with the axis of the drill. The preferred means. for thispurpose, best shown in Figs. 1, land 5, comprise a member 15 carried bythe handle structure. 11, 12 and movable therewith .but maintaining afixed rectilinear movement of the same in parallelism with the axis ofthe drill. To.- this end member 15 takes the form of a yoke havingperforated. ears15. through which rodsll pass and longitudinal groovesor recesses 15 receiving the wings a of the drill (Fig. 5). Bypreference ears 15 are disposed on rods 11 intermediate the lowersprings 13 and the stop nuts 14 whereby the springs hold theears inengagement with the nuts and yoke member 15 is thereby maintained inspaced relation to block 6. Yoke 15 is bowed outwardly as clearlyindicated in Fig- 5 to permit the same to pass over the downwardlyproject ing nut a of the drill when the attachment is being assembledupon the drill. The process of assembling the handle attachment hereindescribed upon the drill consists in aligning the grooves 15 of yoke 15and grooves T of block 6 with the wings a and sliding these partslongitudinally of the.

drill until abutment plate 8 of block 6 engages feed nut a. The clampingbolt 9 is then inserted to rigidly secure block; 6 in place and thedrill is ready to be operated as a manually supported tool.

While what is now considered to be the preferred form of the inventionhas been herein shown and described it is to be understood that theinvention is not limited to the specific details thereof but covers allchanges, modifications, and adaptations within the scope of the appendedclaims.

I claim as my invention:

1. The combination with a drill of the cradle or shell mounted type of ahandle dcvice for adapting the drill to manual operation comprising ablock secured to the feed nut; of the drill, a rod slidably mounted uponsaid block and carrying a handle at one end, resilient means on said rodon opposite sides of said block yieldingly to limit the movement of saidrod, and means on said rod engaging the cradle or shell engagingportions of the drill for preventing angular movement of said rodrelative to said block, certain of said resilient means being an rangedyieldingly to maintain said last named means in spaced relation withsaid block.

2. The combination with a percussive drill of a handle'device foradapting the drill to manual operation comprising a block secured to thedrill, rods slidably mounted on said block and extending therebeyond inopposite directions, a handle secured to said rods at one end thereof,coil springs on. said rods on opposite sides oi said block yieldingly tocushion the movement of the handle relative to the drill, and a yokeconnecting the ends of the rods remote from said handle and slidablyengaging said drill, certain of said springs maintaining said yoke inspaced relation with said block.

3. The combination with a drill of the cradle or shell mounted typehaving wing portions of a handle device for adapting the drill to manualoperation comprising a block and ayoke having recesses slidaby receivingsaid wing portions of the drill, means rigidly securing said block tosaid drill, perfor-ated ears on'said block, spaced rods parallel witheach other and with the axis of the drill slidable in the perforationsof said ears, resilient means limiting the sliding movement of saidrods, said yoke being mounted on said rods adjacent one end thereof, anda handle secured to the opposite ends of said rods.

a. The combination with a drill of the cradle or shell mounted typehavin wing portions and a feed nut, of a hand e device for adapting thedrill to manual operation comprising a block and a yoke having re-.cesses slidably receiving said wing portions of the drill, meansrigidly clamping said block to feed nut, aligned perforated ears on saidblock and on said yoke, rods 'slidably supported in the perforations ofsaid ears, coil springs encircling said rods on opposite sides ofsaidblock, said yoke being mounted upon said rods at one end and engagedby certain of said springs to maintain saidblock and yoke in spacedaelation, and a grip handle secured to the op posite ends oi saidrods.

5. A handle attachment for percussive drills of the cradle or shellmounted type comprising spaced guide membes for engaging the cradle orshellengaging parts of the drill, means for rigidly securing one oi"said members in place, a handle resiliently mounted on said lastnamedmember and carrying the other said member and springs interposed betweensaid members to main tain them in spaced relation.

6. A handle attachment for percussive drills of. the cradle or shellmounted type comprising a block for slidably fitting the cradle or shellengaging portionsof the drill, means for rigidly securing said block tothe feed nut of the drill, means resiliently mounted on said block andcarrying a handle, and a yoke carried by said means for slidably fittingthe cradle or shell engaging portions of the drill, said yoke beingoutwardly bowed to enable it to. passover the feed nut of the drill inassembling the handle attachment on the drill.

7. The combination with a percussive tool of the cradle or shell mountedtypeof a handle detachably secured thereto, said handle havinglongitudinally spaced guide, members engaging the cradle or shellengaging portion of the tool for maintaining the handle against lateralor angular movement relative to the drill, and resilient spacing meansbetween said members permitting movement of one'relative to the other. v

8'.- The combination With a percussive tool of the cradle or shellmounted type of a resilient handle device detachably secured thereto,said handle having longitudinally spaced guide members engaging thecradle or shell engaging portions of the tool for maintaining the handleagainst lateral or angular movement relative to the drill, and resilientspacing means between said members permitting movement-of one relativeto the other, said means forming at least a portion of the resilientsupport for the, handle.

9. The combination with a percussive tool of the cradle or shell mountedtype of a handle detachably secured thereto, said handle havinglongitudinally spaced guide members engaging the cradle or shellengagingpor tion of the tool for maintaining the handle against lateral orangular movement relative to the drill, one of said members beingsecuredto said tool and the other to said handle, and resilient spacing meansbetween said members for cushioning the movement of the handle relativeto the which is secured to said tool.

10. The combination with a percussive tool of the cradle or shellmounted type of a handle detachably secured to said tool, said handlehaving a guide member clamped to said tool and a second guide memberslidably engaging the cradle or shell enga ing guide member portions ofsaid tool for maintaining the an dle against lateral movement relativeto said tool, and resilient means maintaining said members in spacedrelation and providing a cushion for said, handle.

11 The combination with a percussive drill of the cradle or shellmounted type having a feed nut of a handle device therefor comprising amember secured to the feed nut of saiddrill, a handle mounted forlimited sliding movement on said member,"

means -mov'able with said handle; and slidably engaging the cradleorshell 'engagin portions of said drill for maint-ainin sai handle againstlateral movement relative to said dril and a spring interposed betweensaid member and said means for cushioning the relative movement of thesame.

Signed by me at North Bay, Ontario, Canada, this 9 day of May, 1925.

SAMUEL SEAVER.

